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Tag Archives: TARs
HiRISE: Bedrock riddles of Nili Fossae
This image of the Nili Fossae region, to the west of the great Isidis basin, shows layered bedrock with many impact craters. Nili Fossae is one of the most mineralogically important sites on Mars. Remote observations by the infrared spectrometer … Continue reading
Posted in Reports
Tagged bedrock, carbonate minerals, clay minerals, dunes, High Resolution Imaging Science Experiment, HiRISE, iron oxides, Isidis Basin, Mars Reconnaissance Orbiter, MRO, NASA, Nili Fossae, sand dunes, TARs, transverse dunes, transverse eolian ridges, University of Arizona
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Curiosity: Rolling along behind the ridge
Sol 2361, March 29, 2019. Leaving a zigzag track (click the composite image above), Curiosity continues to roll northeastward behind Vera Rubin Ridge, roughly paralleling its direction. Sand dune “blow-overs” are visible to the left of the rover in the … Continue reading
Posted in Reports
Tagged Aeolis Mons, CBU, clay-bearing unit, Curiosity, Gale Crater, Glen Torridon, Mars Science Laboratory, Mount Sharp, MSL, Murray Formation, NASA, sand, sand dunes, TARs, transverse eolian ridges, Vera Rubin Ridge, wind
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Winds of Jezero Crater
[Editor’s note: From a paper by Mackenzie Day and Taylor Dorn recently published in Geophysical Research Letters.] Wind in Jezero crater, Mars • Modern winds in Jezero crater come from the east, but ancient winds came from the southwest • … Continue reading
Posted in Reports
Tagged dunes, eolian processes, Jezero Crater, M2020, Mars 2020, Mars 2020 rover, sand dunes, TARs, transverse eolian ridges, wind streaks, yardangs
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New terrestrial analog for martian megaripple dunes
A new paper [published in Icarus] by M. Foroutan (U. Waterloo, Canada) and co-authors describes the first terrestrial dark sand dunes similar to a type of mysterious dune found on Mars. These megaripples, found surrounding the remote volcanic caldera Wau-an-Namus, … Continue reading
Posted in Reports
Tagged dunes, Libya, sand dunes, TARs, transverse eolian ridges, Wau-an-Namus
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HiRISE: Channeled valley east of Protonilus Mensae
Channelized valley east of Protonilus Mensae. Beautiful Mars series.
Posted in Reports
Tagged Beautiful Mars, dunes, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, Protonilus Mensae, TARs, transverse eolian ridges, University of Arizona, valleys
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HiRISE: Dunes
There shall be order! Beautiful Mars series.
Posted in Reports
Tagged Beautiful Mars, dunes, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, TARs, transverse eolian ridges, University of Arizona
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HiRISE: Rounded mounds in northern Arabia Terra
These rounded, mysterious mounds occur along the floor of a depression in northern Arabia Terra. The mound surface has many parallel troughs that contain light-toned transverse aeolian (e.g., formed by the wind) ridges oriented perpendicular to the trough walls. The … Continue reading
Posted in Reports
Tagged Arabia Terra, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, mounds, MRO, NASA, TARs, transverse eolian ridges, University of Arizona
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HiRISE: Erosion & deposition in Schaeberle Crater
Schaeberle Crater is a large, heavily-infilled crater with many interesting features. This image shows a window into the crater fill deposit, showcasing eroding bedrock and aeolian landforms. This pit is located near the geometric center of our image, making it … Continue reading
Posted in Reports
Tagged deposition, erosion, High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, north polar sand sea, sand, Schaeberle Crater, TARs, transverse eolian ridges, University of Arizona
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HiRISE: Down in the paleochannels
Transverse aeolian ridges — or TARs — are mysterious, wind-blown features that are intermediate in size between ripples and much larger sand dunes. Ripples form from hopping sand grains, and dunes form from sand grains being blown over longer distances. … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, TARs, transverse eolian ridges, University of Arizona
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HiRISE: Bizarre TARs
These strange features in Syria Planum are still being widely debated. They have the same general form as transverse aeolian ridges (TARs) elsewhere on Mars; windblown deposits that are common in the Martian tropics. Their height and spacing are similar … Continue reading
Posted in Reports
Tagged High Resolution Imaging Science Experiment, HiRISE, Mars Reconnaissance Orbiter, MRO, NASA, Syria Planum, TARs, transverse eolian ridges, University of Arizona
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